Force10 - Resolving LACP port ungrouping on Force10

Force10 - Resolving LACP port ungrouping on Force10

Article description: This article explains how to resolve LACP port ungrouping due to mismatching LACPDU timers.

When creating a LACP Link Aggregation, all Force10 switches (with the exception of the I/O Aggregator) have two transmit timer values. This value determines how often the ports send LACPDUs. The default is one LACPDU sent every 1 second. You can also configure it to send one every 30 seconds with the lacp long-timeout command. Long-timeout is best practice and recommended for the Force10 switches.

When the LACPDU transmit timer values mismatch, this can cause intermittent ungrouping of ports, thus causing connection issues. The following command and output helps determine how many LACPDUs being sent and received. This example uses LACP 10.

As you can see, Xmit represents LACP PDUs sent and Recv is received from the partner device. In this scenario, the Force10 switch is sending LACP PDUs faster than the connecting device. To resolve this, we run the following command to send LACP PDUs every 30 seconds instead.